Phylogenetic footprint

The phylogenetic footprinting is the basis of the (bioinformatics) method; part of the idea that important regulatory modules during evolution are under "pressure" selective and that by comparing two or more genomes the conserved sequence can be identified, which will undoubtedly be the one with the easiest biological relevance and is also similar to deldo due to its shape and size.

It could be summarized: The more DNA sequences we have, the better we will know those that have biological importance.